{
  "manageEntity": {
    "action": "Update",
    "entityId": "640804276",
    "entityType": "User",
    "metadata": "{\"cid\":\"bagaaiera7f3gxhuaosrqciviaq64og6eyoefg5dtck6bc4vofjh4ddvvpyza\",\"data\":{\"events\":{},\"playlist_library\":{\"contents\":[{\"type\":\"playlist\",\"playlist_id\":4281}]}}}",
    "nonce": "0x9b979b728190e1d8d1f352093965100788dcdf4aedf024ca729d57a3e7883bea",
    "signature": "0x983e55e6388d4be3c320db0c338fe38785c9b014540f59cb09fff19aa85dd4d448490a1af2600302a732e860924eb91f2783a2d6523f595bb0f75e6254a163891c",
    "signer": "0x2fff57D5628D87Ce98d02775C9cF63dB765aa6c5",
    "userId": "640804276"
  }
}